1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983aac95128ce4fffad4129cfaabc45651b8d54a9a04330f64676aeb19e8cc03. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d99a4c2b-58a8-4be6-aa55-5971a9694803.json and https://artists.proofprofile.net/proofs/artist/d99a4c2b-58a8-4be6-aa55-5971a9694803.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e8ae0bf4ab86183a7ec4d7240246203fa481cff42b8333ec235df4811806f5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2166984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04d93c6828c454edae27a7ca6cad937cf8b5048ab297e99779c37b6b5b2c57c. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2166992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d899406e7695b2e93aee73d748de494d22f424fa42b5e7fbabac68c5faa851. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2182805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc79cbbdec342afade6587533fa258d52a944fb694b32d5eb341d0b6e7f8d89. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2182810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d0f7c5ec858fbb89cbfde71b78954b008dd2d2563befbb5f240b3cf687e519. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2182816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38f49bfcd6d3b59e8954cec348030bf2121f10a367cf11f69e01de4640dd4f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2182822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3ae523de7920282eac5e8e5ac8859e4807eefaf91036c6809b0947fe267bcf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2182829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dd8324cdb34803777a0ce0fefe6979992ae8abc8255bbab61adf7ebc779998. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2182840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ac879565601245f4ea4307d43d13a4a07692de66076b036effaa5e7f1e601b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2182841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842cbc37b53910a27bbd1444829d78abedf1feebc31193358118516fb05f7757. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2182842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039d12d7dc0546827ba4f59cd00388c6e049aea978f73f5955fe3f16d7e9fc2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0aab73644357617058a7533982c2df11ad60c79c32aad56a96779a4b7c137e7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d635429e83f0d4615def770f4101dd044e5958075f669bd3e15af0ddf4034. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd7378d4deec7d11a721512e30d085ecb2ce3651cb2af03b05acf058ebe116f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd11431d2085b4a2dab2e8da244be663b21e7fa9803ea0752881224fbc5af6d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ac7889035b2b01816e43ed4da5b9746742997e72d2406d236b2ab4d291dc0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6823b6cb6d99c932eb35bfb11d0d494932b6b99cf49a76b2111b486dc5d5104. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b7141476eda1c375f6063cdea4b565359fc741a624f8d2aef61406fbdb053d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f594e4fc7b656b01fc05be9cf24a65d080fe474ef8965eb0771f9a372eb043. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7816ea3d16bc31f7e4ab162a2927b7aaf1b2cecb7a3a25d351234ffc05dcdc5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d51ea8fd235ee3f103dd75a646ed808f4e5533da52def8864cc48d6f9229e1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e6e23ed45bb43cabe2f631c40e160fd6ac09e59af76e2905220db254566dc4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6303af2b89a814cebe2b5940661df4d8cc041ef44bf140bdcd13d3dc69c7916d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2109400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242cedf1b17dde00a03adad2bc26998e41dbaebea7c9c1ba5aab96c408e90c14. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2336813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079978e5cdb154dae77f8a53a9b5dad37e6a5b10e2ea7817a76af9764ebd073d. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2499951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc29d4b0ac96d6e8bdeca9e39430806622e05895767782e86123005b82a39b2c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2499952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddd06e28a4d35fef90d951c4601f1cc4bc8bb16287adbf19b491dbb1e5fcc23. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2499954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386dee8a7365a41399c1f3d890d16b0ad1472435a116b6370642257ec2e53253. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2499955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8dc74505d4ae17b1cd82d87a8047c0672fa4f4e24836d20e627604528f5fbc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2499957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3342b73af7303ea6e77a48d779623ea71963c02912c541a6a332213690bc09. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2499964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd541280a3a046ea91723ae3dcbecb9c2bffad296defa7f2fea2ba06b27db9751. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2499969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f20fa5612abc952f8432400e6853dd21d8d3ac52a9c9ef8658a1ea3531a23f0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ8B2438933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0769a60b0f872a66caeae287c467fe8eef05305affe3a19a3d8b58e13fa34c4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEC2437195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467b420b73687104d0912a95ca81a1444e0f16f65afbf2755a54ee710e04a932. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2534760.